DEODORANT PROPERTIES OF'NACCONOL 309 baths. Hair acquires an odor char- acteristic of the individual and it may in certain instances become offensive. This odor, for the most part, is washed away in a shampoo- ing operation. In the case of dogs the so-called doggy odor can reach the point of being seriously objec- tionable. Where a simple washing operation does not remove suffi- cient odor the detergent may be ap- plied directly to the washed hair. It is often desirable not to rinse the hair too thoroughly after a deter- gent shampoo thus leaving a re- sidual deodorizing material and per- mirting some control of the organ- isms on the hair. Solutions of detergents are often used for bubble baths. As bubble baths they are effective in washing away odoriferous substances and bacteria which cause them. The ordinary bubble bath is so dilute that there is no residual effect and no impediment to the development of odor from fresh perspiration. DEODORANT POWDER Deodorants can, of course, be pre- pared as powders to be used either in the powder form or in solution. Where the powder is used in solu- tion, the same comments hold as hold for the deodorant solutions. Unless substantial amounts are used they serve only to wash away odors without any residual effect. DEODORANT DETERGENT CAKES A recent development now being studied is the detergent soap cake. These soap cakes were developed by our Company during the last World War to provide Navy salt water soap at the time when the supply of coconut oil from the Philippines was suddenly cut off. Cakes of soap containing substantial amounts of "Nacconol" have all of the anti- septic action required for the control of perspiration odors. The ma- terial can be applied by working up a lather from the detergent cake, as for example under the arms, and then wiping away the suds with a damp cloth. The effectiveness of this treatment is easily tested by washing under one arm with the "Nacconol" cake and under the other arm with ordinary soap. The deodorizing action will be apparent in a few hours and strikingly evident in a day. The effectiveness of the deodorant action also carries over to garments which would otherwise acquire an offensive smell through the accumu- lation of perspiration. The use of this detergent cake substantially eliminates the odor of perspiration in the garments. As a matter of fact if garments which have an offensive smell due to perspiration are mois- tened with "Nacconol" and aired, the offensive odor will disappear. DEODORANTS The consciousness of human odors has developed rapidly in recent years. The important develop- ments in personal deodorants have taken place in the last 40 years. During that period there has been a steady improvement in the cleanli- ness of people in this country and

310 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS each day sees higher standards. Improved methods of deodorizing find ready acceptance and soon be- come necessities. The deodorant manufacturer has found a rapidly expanding demand and market for products which are simple to use and effective in practice. The public has learned the priceless value in the use of deodorants. The cosmetic chemist is contrib- uting generously to our social life by removing that offensive barrier of smell which throughout the ages has been holding people apart.